Steam-engine governor



(No Model.) 2 Sheets-Shet 1.

w. A. BOLE.

STEAM ENGINE GOVERNOR. No. 343,430. Patented June a, 1886.

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(No Model.) 2 Sheets-Sheet 2.

W. A. BOLE.

STEAM ENGINE GOVERNOR.

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Patented June 8, 1886.

' UNITED STATES PATENT OFFICE.

WILLIAM A. BOLE, OF IITTSBURG, PENNSYLVANIA.

STEAM-ENGINE GOVERNOR.

SPECIFICATIQN forming part; of Letters Patent No. 343,430, dated June 8,1886.

Application filed April 19, 1886. Serial No. 199,384. (No model.)

To all whom, it may concern: 1

Be it known that I, WVILLIAM A. BOLE, residing at Pittsburg, in thecounty of Allegheny and State of Pennsylvania, a citizen of the UnitedStates, haveinvented or discovered certain new and useful Improvementsin Steam-Engine Governors, of which improvements the following is aspecification.

In the accompanying drawings,which make part of this specification,Figure 1 is a face view in elevation of a steam-engine governorembodying my invention; Fig. 2, a side View in elevation of the same;and Figs. 3 and 4 face and side views, respectively, of a governor,illustrating a modification of the spring.

My invention relates to steam-engine governors of that class which aremounted upon the crank-shaft of the engine or upon a counter-shaftrotated therefrom, and in which regulation is effected by variations ofthe position of a valve-operating eccentric, induced in oppositedirections by the centrifugal force of a weight and the tension of aspring, respectively.

The object of my invention is to simplify and economize in a materialdegree the construction of a governor of such type, and to enable thesame to be readily and quickly connected to and detached from itssupport upon the shaft.

To this end my invention, generally stated, consists in thecombination,with a crank-arm or disk, of an eccentric formed in a singlepiece and having a lateral passage extending from its periphery to atransverse shaft-opening; also, in the combination of a crank-arm ordisk, an eccentric having a lateral passage and a transverseshaft-recess, and formed integral with a centrifugally-acting weight anda pivot-arm, a pivot coupling the eccentric arm to the crank-arm, andaspring connected to the eccentric arm and exerting tension thereon inopposite direction to the action of, the weight. w

The improvements claimed are hereinafter fully set forth.

In governors of the class to which my invention relates it is ordinarilynecessary to divide the movable eccentric diametrically into twosections in order to fit it in position around the crank-shaft, suchconstruction being indispensable in the types heretofore employed whenapplied, as they are frequently required to be, between a pair ofcranks. The weights which exert centrifugal action have heretofore beenpivoted to the crank-disk and coupled by links to the movable eccentric,such construction, together with the divided eccentric and itsconnecting-bolts, involving considerable structural cost, andbeingundesirable for use in locations which are not readily accessible byreason of the difficulty of putting the parts in place and detachingthem as required. Under my invention I am enabled to material] y reducethe first cost of the governor and to apply and remove it or either ofits members as required with great facility, irrespective ofconditionsimposed by its location or the relation of adjacent members.

In the practice of my invention I provide an eccentric, 1, in which isformed a transverse opening or shaftway, 2, of proper dimensions toadmit of its desired traverse transversely to the crank-shaft 3, onwhich the governor is mounted for adjustment under the action ofcentrifugal force. A lateral gap or passage, 4, is likewise formed inthe eccentric from its periphery to the adjacent side of the shaftway 2,the passage 4 being of slightly greater width than the diameter of thecrankshaft 3, so as to enable the eccentric to be located in properposition for connection to its support by moving the sides of thepassage 4: past the crank-shaft; A pivot-arm, 5, is cast upon one sideof the eccentric, and projects therefrom in an opposite direction to thepassage 4, and the eccentric is pivoted by a pin or bolt, 6, toacrank-arm or disk, 7, on the crankshaft 3. A weight, 8, by which thecentrifugal action requisite for the adjustment of the position of theeccentric relatively to the crankline is exerted, is cast upon one sideof the eccentric at one end of the shaftway 2, constituting,substantially, an enlarged prolongation of the pivot-arm 5. The weight 8may be cored out as shown, providing a recess for receiving a filling oflead, to increase in desired degree its centrifugal action. The movementof the eccentric 1 in opposite direction to that induced by the weight8, consequent upon re duction of speed of the crank-shaft andcorresponding diminution of centrifugal force, is

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effected by a spring, 9, adapted to exert tension upon the pivot-arm 5in opposite direc tion to the tendency induced by the weight 8.

The drawings illustrate two forms of construction and location of thecentripetallyacting spring, each of which admits of its tension beingell'ectivel y exerted in the manner above stated.

Referring to Figs. 1 and 2 the spring 9 is shown as composed of curvedplates or leaves, which are secured at one end by a bolt, 10, to a seator face, 11, on the pivot-arm 5, adjacent to the center of the openingthrough which the pivot-pin 6 passes. The opposite end of the spring 9is curved in conformity with and abuts against a bearing, 12, on theperiphery of the crank-shaft, which bearing may, if desired, be providedwith a removable facing to prevent wear of the shaft. Movement of theweight outwardly from a line passing through the centers of theeccentric pivot and crankshaft tends to straighten the spring, and iscorrespondingly resisted by the tension there of, which, except asovercome by the ceutrifugal force of the weight, acts to move thecocentric into and maintain it in the position shown in the drawings,being that of greatest eccentricity.

In the construction illustrated in Figs. 3 and 4 the spring 9 is ofhelical form, and is coupled at one of its ends to an eye, 13, on thepivot-arm 5 of the eccentric, and at the other to a block, 14-, boltedto the crank-disk 7. Out ward movement of the weight 8 tends to extendthe spring, and is resisted by its tension in a similar manner to thatof the plate-spring first described.

The weight 8 may be balanced for gravity by a fixed counter-balance onthe opposite side of the crank-disk, or by other means suitable for thepurpose.

I claim herein as my invention-- 1. The combination of a crank arm ordisk and an eccentric pivoted thereto, said eccentric having atransverse shaftwa-y or opening and a lateral passage or opening leadingthere from to its periphery, substantially as set forth.

2. The combination of a crank arm or disk, a movable eccentric havingatransverse shaftway or opening, and a lateral passage or openingleading therefrom to its periphery, a weightand a pivot arm formedintegral with the eccentric at one end and one side, respectively, ofits shaftway, a pivot coupling the pivot-arm to the crank arm or disk,and a spring connected to the pivot-arm in position to exert tensionthereon in opposite direction to the centrifugal action of the weight,substantially as set forth.

3. Thecombination of acrank-shaft, acrank arm or disk fixed thereon, aneccentric having atransverse shaftway or opening and pivoted through alateral arm to the crank-arm or dish, a centri fn gall y-acting weightfixed to the eccentric at one end of its shaftway, and a plate-springfixed at one end to the pivot-arm of the eccentric and hearing at theother against the periphery of the crank-shaft, substantially as setforth.

4. In a steam-engiue governor of the type adapted to be mounted on thecrank-shaft of the engine, a movable eccentric having a transverseshaftway or opening, a lateral passage or opening leading therefrom toits periphery, a pivot-arm extending from the eccentric on one side ofits shaftway and in opposite direction to its lateral passage, and aweight fixed to the eccentric at one end of its shaftway, substantial] yas set forth.

In testimony whereof I have hereunto set my hand.

\VILLIAM A. BOLE.

